Dosage apparatus



Sept. 27, 1966 K. 1. EDWARDH DOSAGE APPARATUS Filed May 51. 1965 INVENTOR.

KAR L I. EDWARD H United States Patent 3,275,019 DOSAGE APPARATUS Karl Ivar Edwardh, Linnegatan 4, Goteborg, Sweden Filed May 31, 1963, Ser. No. 284,618 Claims priority, application Sweden, June 1, 1962, 6,170/ 62 4 Claims. (Cl. 137-99) This invention rel-ates to an apparatus for the dosage of liquids and/ or gases.

The main feature of the apparatus comprises a rotor housing with a cylindrical rotor provided with a number of wings, slides or the like which are movable relative to the rotor body, said wings, slides or the like being adapted during the rotation 'of said rotor to slide with their radially outer borders against the inside of said housing which is shaped as two rounded half, hollow cylinders opposing each other and with the axis of the half cylinder planes situated at a distance from each other. The wall portions connecting the latter are arranged at equal distances from each other, whereas the inlets and outlets for the mediums to be closed are situated close to said cylinder axis planes, the rotor and housing being carried for a relative displacement between them with their end positions located in said planes.

Such an apparatus can be used for mixing in correct relationship oxygen and air for being pressed into the lungs of a patient with paralyzed respiratory organs. In previously used apparatuses there has been a risk for an over-dosage of oxygen but there is no such risk involved in the use of the apparatus according to the present invention.

An example of an apparatus in accordance with the invention will now be described with reference to the accompanying, partly diagrammatic drawing showing an embodiment of the apparatus.

The shown apparatus comprises a rotatably mounted rotor 1 with slides 3 movable in essentially radially slots 2. Upon the rotation of the rotor the slides 3 are displaced outwards under the influence of the centrifugal force, this eflFect being increased by the action of helical springs 4 arranged between the inner end of the slots 2 and the inner ends of the slides the latter hereby being pressed against the rotor housing 5 which is shaped as two hollow half-cylinders 6 and 7 with the diameter planes 8 and 9, respectively, situated at some distance 10 from each other. Two essentially parallel wall portions 11 and 12 extend between the cylinder halves 6, 7. Close to the diameter plane 8, the rotor housing 5 is on one side provided with an inlet 13 foraccording to the above recited example of useoxy-gen and at the opposite side with an outlet 14 for the oxygen. Close to the diameter plane 9 the housing 5 is on one side provided with an inlet 15 for air and at the opposite side with an outlet 16 for the air. The conduit 17 from the oxygen outlet 14 is coupled to the conduit 18 for the air outlet 16. The conduit 19 will therefore normally lead off the resulting mixture of oxygen and air. The shaft 20 of the rotor 1 is carried in such a way that the rotor can be moved in the direction of the double arrow 21. By means of such a displacement the volume of the crescentshaped space 22 between the mantle surface of the rotor and the inner wall of the hollow cylinder 6 is enlarged or reduced whereas the size of the volume of the crescentshaped space 23 between the mantle surface of the rotor 1 and the inner wall of the hollow cylinder half 7 is correspondingly reduced or enlarged to the same extent.

When oxygen is pressed in through the inlet 13, the rotor 1 is driven in the direction of the arrow 24 by the gas pressure against the slides 3. The stream of oxygen escapes-upon passage through the space 22-through 3,275,019 Patented Sept. 27, 1966 "ice the outlet 14 to the conduit 17. The rotation of the rotor 1 causes a suction of air in through the inlet 15,

the air then being pressed by the slides 3 out through the outlet 16 into the conduit 18. The volumes of the two components can be adjusted by moving the rotor 1 in one direction or the other of the double arrow 21. The mixture of oxygen and air escapes through the conduit 19 and is fed eg to the rubber bellows in a respirator for being delivered to the lungs of a patient.

The dosage apparatus according to the present invention may be provided with a regulator driven by the shaft 20, e.g. a centrifugal regulator, which ensures an essentially constant speed of the rotor 1.

Instead of moving the rotor 1 along the double arrow 21 it is possible to journal the shaft 20 in fixed carryings and to move the housing 5 along the double arrow 21. By means of dash and dot lines it is indicated to the left in the drawing how the housing 5 can be provided with a carrying lug 25 by means of which the housing 5 can be carried on a shaft 26 which is parallel to the shaft 20. In this case the housing 5 will be swung in such a way that its centre moves along an arc of a circle. The inner side of the wall parts 11, 12 of the housing 5 between the diameter planes 8, 9 must of course in such a case be given the shape of an arc of a circle.

According to another embodiment of the invention the dosage apparatus constitutes a part of a device, e.g. an electric motor, by means of which the shaft 20 is mechanically driven. In this case neither the oxygen nor the air has to be fed under any notable pressure and the two components may be sucked into and again be pressed out of the dosage apparatus by means of the rotor 1. Also in this case the mixing is performed in exact quantities by means of the adjustment of the rotor relative to the housing 5.

The total mixture volume delivered is dependent on the speed of the rotor 1 and the size of the apparatus.

It is of course also possible to mix other components than oxygen and air. As an example may be mentioned the mixture of a gas and a liquid or two different liquids.

The present invention has been described in detail above for purposes of illustration only and is not intended to be limited by this description or otherwise except as defined in the appended claims. The material in the details of the apparatus should be chosen in correspondence to the components to be mixed. The material should of course withstand corr-oding gases or liquids when such are present. By a doubling of the dosage apparatus it is possible to mix more than two components. The slides 3 can be replaced by swingable wings etc. which during the operation of the rotor with their outer borders are brought to rest against the inside of the housing 5. With advantage the dosage apparatus can be used in the manufacture of paper pulp.

What I claim is:

1. A dosage device for fluids comprising a closed rotor housing, said housing being formed by a middle hollow portion open at its opposite ends, said ends lying in a pair of spaced parallel planes, and a hollow half-cylinder attached to each of said ends, a cylindrical rotor having a plurality of feeding means movably mounted on said rotor and biased to engage a Wall formed in said housing, an inlet and an associated outlet for each half cylinder located adjacent the respective planes, the inlet and the outlet of one half cylinder lying on opposite sides of a transverse plane at right angles to said rfirst mentioned planes, said rotor being rotatable about an axis adjustably supported relative to the housing for relative movement approximately at right angles to said parallelplanes.

2. A dosing device as claimed in claim 1, said rotor being movable at said right angles for any position of I the rotor about said axis.

3. A dosing device as claimed in claim 1, said axis being in a substantially fixed location, a fixed shaft parallel with said axis, and means for mounting the housing to swing on the shaft to efiect limited amounts of the relative movement of the .axis and said parallelplanes approximately at right angles. V

4. A dosing device as claimed in claim 1, the inlets connected together.

No references cited.

WILLIAM F. ODEA, Primary Examiner.

ISADOR' WEIL, Examiner.

i D. ZOBKIW, Assistant Examiner. 

1. A DOSAGE DEVICE FOR FLUIDS COMPRISING A CLOSED ROTOR HOUSING, SAID HOUSING BEING FORMED BY A MIDDLE HOLLOW PORTION OPEN AT ITS OPPOSITE ENDS, SAID ENDS LYING IN A PAIR OF SPACED PARALLEL PLANES, AND A HOLLOW HALF-CYLINDER ATTACHED TO EACH OF SAID ENDS, A CYLINDRICAL ROTOR HAVING A PLURALITY OF FEEDING MEANS MOVABLY MOUNTED ON SAID ROTOR AND BIASED TO ENGAGE A WALL FORMED IN SAID HOUSING, AN INLET AND AN ASSOCIATED OUTLET FOR EACH HALF CYLINDER LOCATED ADJACENT THE RESPECTIVE PLANES, THE INLET AND THE OUTLET OF ONE HALF CYLINDER LYING ON OPPOSITE SIDES OF A TRANSVERSE PLANE AT RIGHT ANGLES TO SAID FIRST MENTIONED PLANES, SAID ROTOR BEING ROTATABLE ABOUT AN AXIS ADJUSTABLY SUPPORTED RELATIVE TO THE HOUSING FOR RELATIVE MOVEMENT APPROXIMATELY AT RIGHT ANGLES TO SAID PARALLEL PLANES. 